Stair and Angle Calculator
Utilities
$0.99 · Designed for iPad. Not verified for macOS.
Six essential building calculators in one clean app. Stairs, roof, triangle, area, circle, and room — work in mm, cm, m, or ft.
Stair and Angle Calculator gives tradespeople and DIYers six precise calculators in one clean, fast app. No clutter,
no subscriptions — just the numbers you need on site.
STAIRS
Enter total height, total run, and maximum step height. The app works out the number of steps, exact riser height, and
going, accounting for optional top and bottom landings.
ROOF
Calculate rafter length, ridge height, and roof area. Work by pitch angle or by rise — enter your total span and the
app does the rest. Add roof depth to get surface area for materials.
TRIANGLE
Solve any right-angle triangle. Enter two of the three sides (A, B, or hypotenuse C) and get the missing side, both
angles, and area instantly.
AREA
Switch between rectangle and circle modes. Enter length and width for area, or add height to get volume — useful for
concrete, soil, or fill calculations. Circle mode gives area and circumference from a radius.
CIRCLE
Go deeper with circle geometry. Enter a radius and optional arc angle to calculate arc length, chord length, and
sector area — useful for curved walls, arches, and landscaping.
ROOM
Plan paint, tiles, and flooring for any room. Enter length, width, and height, then specify the number of doors and
windows (or a total opening area) to get net wall area automatically deducted.
UNITS
All calculators support mm, cm, m, and ft. Switch units at any time using the ruler button — inputs convert instantly.
Simple, reliable, and built for real work.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- New Calculators Added
The developer, Paul Simmonds, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Paul Simmonds
- Size
- 2.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Simapp
